Where can I find this…

you
I am looking for 5/8” od by 10” L tube suitable for connecting two heater hoses togethe. It would look like this if I can only find it. I’ve searched around the internet, but only came across a pic of what I’m looking for, not in the size I need. Any ideas where I can find something like it?

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could make it out of copper , available at a plumbing supply , better known as a copper stub out ...